\[Страница\ 106.\]
\[\boxed{\mathbf{4.}}\]
\[\textbf{а)}\ 1414\ :14 = 101\]
\[\textbf{б)}\ 3,75\ :5\frac{1}{3} = 3\frac{3}{4}\ :\frac{16}{3} =\]
\[= \frac{15}{4} \cdot \frac{3}{16} = \frac{15 \cdot 3}{4 \cdot 16} = \frac{45}{64}\]
\[\textbf{в)}\ \frac{8}{15}\ :\frac{4}{15} = \frac{8 \cdot 15}{15 \cdot 4} = 2\]
\[\textbf{г)}\ 5\frac{2}{5}\ :2,5 = \frac{27}{5}\ :\frac{5}{2} = \frac{27 \cdot 2}{5 \cdot 5} =\]
\[= \frac{54}{25} = 2\frac{4}{25} = 2,16\]
\[\boxed{\mathbf{5.}}\]
\[\textbf{а)}\ первое\ число\ меньше\ \]
\[второго;\]
\[\textbf{б)}\ первое\ число\ больше\ \]
\[второго;\]
\[\textbf{в)}\ оба\ числа\ равны;\]
\[\textbf{г)}\ первое\ число\ равно\ нулю.\]
\[\boxed{\mathbf{6.}}\]
\[\textbf{а)}\frac{8}{15}\ :\frac{8}{45} = \frac{8 \cdot 45}{15 \cdot 8} = 3 \Longrightarrow 3\ к\ 1.\]
\[\textbf{б)}\frac{9}{34}\ :\frac{9}{17} = \frac{9 \cdot 17}{34 \cdot 9} = \frac{1}{2} \Longrightarrow 1\ к\ 2.\]
\[\textbf{в)}\frac{1}{4}\ :0,5 = \frac{1 \cdot 2}{4 \cdot 1} = \frac{1}{2} \Longrightarrow 1\ к\ 2.\]
\[\textbf{г)}\ 6,25\ :3,75 = \frac{5}{3} \Longrightarrow 5\ к\ 3.\]
\[\textbf{д)}\frac{15}{34}\ :\frac{15}{119} = \frac{15 \cdot 119}{34 \cdot 15} =\]
\[= \frac{7}{2} \Longrightarrow 7\ к\ 2.\]
\[\textbf{е)}\ 0,8\ :1\frac{1}{2} = \frac{4 \cdot 2}{5 \cdot 3} =\]
\[= \frac{8}{15} \Longrightarrow 8\ к\ 15.\]
\[\textbf{ж)}\ 2\frac{4}{15}\ :1,7 = \frac{34 \cdot 10}{15 \cdot 17} =\]
\[= \frac{4}{3} \Longrightarrow 4\ к\ 3.\]
\[\textbf{з)}\ 10,42\ :0,8 = \frac{521 \cdot 5}{50 \cdot 4} =\]
\[= \frac{521}{40} \Longrightarrow 521\ к\ 40.\]